I have never used the Pro version. I only have the regular one and any comparison I have done were at the store
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The non laminated display is better for sure, I am just not sure that it is worth paying that much more. I would not lie though. I do get that hollow feeling when I write down on my iPad's display. I just prefer to save money and live with this, then to pay more.
Speakers are important too if you use the iPad as a media consumption device. I would not. Every time I try to watch a movie on the iPad I get crazy. The display is too small, I can't position it the way I want it to be, there are issues with the screen ratio and the subtitles. Overall for me it sucks for watching movies and I would choose my laptop in any given day. The only case where I would watch a movie on my iPad is when I have no other way and there is no TV, computer or other screen where I can put on the movie. That happens rarely.
The 120 HZ display is also a good option and I bet that for artists this is a must. For regular folks (like me) who use the iPad mostly as a digital notebook I could tell you that there no noticeable lag when using the pencil. I am not saying that the Pros are not better, I am saying that you have to really focus on comparing the Pro and the regular version to see this. And that for me means that for most of the people it's not an issue. If you can't notice a thing without someone pointing it out to you, it's not a problem. Now if you have used Pro in the past then yes it would be a problem for you. For person like me who just bought their first iPad I would not treat it as a problem.
One thing that IMO people don't talk enough when comparing regular iPad and iPad Pro is the RAM. I assume this is what
@DNichter means when he is talking about performance (sorry if my assumption is wrong). I do notice the lack of RAM. Btw I realized that it's more noticeable when you have less battery charge left (around 20 %). Then iOS starts reloading apps like crazy. This is the thing I dislike the most. I guess it largely depends on one's usage but I do have issues like that with the regular iPad so maybe my usage is a bit more extreme.
Don't get me wrong Pros are great, but every person should think on their own usage and whether they can use the Pro up to its potential. In the end of the day everyone of us decides if the Pro is worth the price for them or not. And that highly depends on one's usage.
This is why I cannot recommend a certain device. It largely matters on how you would use that device. Take me. I don't need tablet. I have never had the need for a tablet. I have laptop with me all the time. It's the device that I use the most. I am used to it and I have no need of finding substitute for said laptop. It has what I need for my workflow.
I bought the iPad for the pencil because I wanted a digital notebook to write down my notes during meetings at work. For purpose like that the regular iPad is actually great. For purposes like this the Pro is overkill.